Granted Patent
Utility
US 4,480,182 · App. 06/358,822
Single plane optical membrane switch and keyboard
Inventors:
Richard I. Ely, Carl E. Mosier
Patented Case
View Patent ↗
Granted: Oct 30, 1984
Filed: Mar 16, 1982
Inventors
Richard I. Ely
Carl E. Mosier
Assignee (at issue)
Burroughs, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.